This document describes the installation and precautions of the SDI digital input board, which can be used to set the frequency of the inverter by inputting a digital signal from the outside.
This manual describes the SDI digital input board used to set the frequency of high‑performance silent VFDs via external binary or BCD signals. It explains the board’s purpose, signal formats, and safety precautions.
Key sections cover preparation before installation, terminal functions, basic operation, wiring examples, electrical specifications, and usage notes. The document also includes example input data and wiring diagrams to help users correctly connect the board to a VFD. This manual is written in Chinese.
| Signal type (binary) | 16 bit |
|---|---|
| Maximum power current | < 2 mA |
| Resolution (binary) | 0.01 Hz |
| Frequency range (binary) | 0.01 Hz ~ 600.00 Hz |
| Frequency range (BCD) | 0.01 Hz ~ 99.99 Hz |
| Response time | max 60 ms |
Power must be cut and the indicator lamp confirmed off before installing or removing the board; installing while powered can cause malfunction or injury.
The board accepts either a 16‑bit binary signal or a 4‑bit BCD signal, provided through contact (relay) or open‑collector inputs.